We started with some random restarts notice in the early hours last week, and between very defined time limits. This then worsened and was affecting the server during any hour, regardless of if players were on or not.
We have worked closely with our hosting service, and also in our test environment, to try and identify if this was in any way plugin related.
This has now resolved, and we are back to our usual 99.999% up-time and rock solid stability. This was not caused by plugins, or config changes on our part, and can only be attributed o some sort of external influence on the VPS